CN205017130U - Magnetic steel structure of motor rotor - Google Patents
Magnetic steel structure of motor rotor Download PDFInfo
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- CN205017130U CN205017130U CN201520732757.XU CN201520732757U CN205017130U CN 205017130 U CN205017130 U CN 205017130U CN 201520732757 U CN201520732757 U CN 201520732757U CN 205017130 U CN205017130 U CN 205017130U
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- magnet steel
- section magnet
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Abstract
The utility model provides a magnetic steel structure of motor rotor splices the doughnut -shaped structure who forms by three angular cross section magnet steel of n inter block and n group three outer angular cross section magnet steel in turn, three interior angular cross section magnet steel summits on the doughnut -shaped structure excircle, and in adjacent two between the summit of three angular cross section magnet steel the central angle of circular arc be 360 n, realize in doughnut -shaped structure on three outer angular cross section magnet steel summits, and the central angle of circular arc is 360 n between two adjacent three outer angular cross section magnet steel summits, three outer angular cross section magnet steel radially magnetize along doughnut -shaped structure, and three interior angular cross section magnet steel magnetize along doughnut -shaped structure circumference. This structure reinforcing motor air gap flux does benefit to and reduces the size of the electric machine and carry high power density. And weaken the magnetic flow of electric motor rotor one side, the motor no longer needs the magnetic material rotor to provide the magnetic flow way, and non - magnetic materials can be selected for use to the rotor material, lightens motor weight. Because air gap field sine distribution degree is higher, harmonic content is little, need not the chute so decide the rotor, reduces motor technology complexity.
Description
Technical field
The utility model relates to technical field of motors, is specially a kind of magnetic steel structure of motor rotor.
Background technology
Along with the development of magneto, it is widely used in every field, and increasing pursuit high-performance and lighting.From design of electrical motor principle, improve the magnetic flux density that namely magnetic loading increases motor gas-gap, motor volume can be reduced and improve power density.For magneto, the measure increasing motor gas-gap magnetic flux density generally has two kinds, and one is tried every possible means from magnetic steel material, selects the permanent magnetic material that residual magnetic flux density is higher as far as possible, but the factor such as material property and price that is subject to limit, the optional leeway of reality of permanent magnetic material is little; Another kind method changes magnetic steel structure and arrangement mode, and the magnetic flux density entering air gap is strengthened.Common magneto, the many employing radial directions of permanent magnet or axial arrangement, such structural electromotor magnetic circuit forms closed-loop path by magnetic conduction rotor, enters the close reduction of magnetic of air gap, and rotor yoke part need select permeability magnetic material, motor performance is reduced and weight increase.
Summary of the invention
The technical problem solved
The utility model one of is intended to solve the problems of the technologies described above at least to a certain extent or at least provides a kind of useful business to select.For this reason, an object of the present utility model is to provide a kind of magnetic steel structure of motor rotor, increases motor gas-gap magnetic flux density by this structure, reduces motor volume and improves power density.
Technical scheme
In one of the present utility model, the utility model proposes a kind of magnetic steel structure of motor rotor, it is characterized in that: described magnetic steel structure is the cirque structure be made up of n group Triangle ID cross section magnet steel and the outer triangle section magnet steel alternative splicing of n group; Magnet steel summit, described Triangle ID cross section is on cirque structure cylindrical, and between the summit of adjacent two Triangle ID cross section magnet steel, the central angle of circular arc is 360 °/n; Described outer triangle section magnet steel summit is in cirque structure inner circle, and between adjacent two outer triangle section magnet steel summits, the central angle of circular arc is 360 °/n; Outer triangle section magnet steel is along cirque structure radial magnetizing, and Triangle ID cross section magnet steel magnetizes along cirque structure circumference.
Beneficial effect
According to embodiment of the present utility model, this architecture enhance motor gas-gap magnetic flux, very effective to reducing motor volume and improving power density.And this structure effectively reduces the magnetic flux of rotor side, therefore motor no longer needs rotor to adopt magnetic material to provide flux path for it, such rotor material to choose space very large, the non-magnet materials such as the aluminium of lightweight can be selected to replace, can effectively alleviate motor weight.In such an embodiment, because air-gap field Sine distribution degree is higher, harmonic content is little, therefore rotor is without the need to skewed slot, reduces motor process complexity.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is traditional magnetic steel structure of this patent;
Fig. 2 is the triangle segmentation magnetic steel structure of this patent;
Fig. 3 is the magnetic line of force simulation result of this patent;
Fig. 4 is the magnetic field intensity simulation result of this patent;
Fig. 5 is the air gap flux density simulation result of this patent;
Fig. 6 is the phase current simulation result of this patent.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Therefore, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In description of the present utility model, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
At present for magneto, the measure increasing motor gas-gap magnetic flux density generally has two kinds, and one is tried every possible means from magnetic steel material, selects the permanent magnetic material that residual magnetic flux density is higher as far as possible, but the factor such as material property and price that is subject to limit, the optional leeway of reality of permanent magnetic material is little; Another kind method changes magnetic steel structure and arrangement mode, and the magnetic flux density entering air gap is strengthened.Common magneto, the many employing radial directions of permanent magnet or axial arrangement, such structural electromotor magnetic circuit forms closed-loop path by magnetic conduction rotor, enters the close reduction of magnetic of air gap, and rotor yoke part need select permeability magnetic material, motor performance is reduced and weight increase.
The utility model proposes a kind of novel magnetic steel structure of motor rotor, its objective is by this structure increase motor gas-gap magnetic flux density, reduce motor volume and improve power density.
As shown in Figure 2, the Novel motor rotor magnetic steel structure in the present embodiment is the cirque structure be made up of 12 groups of Triangle ID cross section magnet steel and 12 groups of outer triangle section magnet steel alternative splicings; Magnet steel summit, described Triangle ID cross section is on cirque structure cylindrical, and between the summit of adjacent two Triangle ID cross section magnet steel, the central angle of circular arc is 30 °; Described outer triangle section magnet steel summit is in cirque structure inner circle, and between adjacent two outer triangle section magnet steel summits, the central angle of circular arc is 30 °; Outer triangle section magnet steel is along cirque structure radial magnetizing, and Triangle ID cross section magnet steel magnetizes along cirque structure circumference.
From structure, can be understood as and the tradition 12 pole surface-mount type magnetic steel structure shown in Fig. 1 is carried out triangle segmentation from the mid point of magnet steel inner circle along in figure shown in dotted line, form the magnetic steel structure be made up of 24 blocks of magnet steel shown in Fig. 2, the number of poles after segmentation is identical with original number of poles.And change the magnetizing direction of magnet steel, as shown in Figure 2, peripheral triangle magnet steel keeps original mode that magnetizes, and is magnetized according to the vertical direction with peripheral magnet steel by the triangle magnet steel of inside, make magnetic field form loop by inner magnet steel as shown in Figure 3, and do not pass through curvature.
Utilize Ansoft software to emulate this new structure, simulation result is as follows: the magnetic line of force distribution map being illustrated in figure 3 motor, and as can be seen from the figure the magnetic line of force of motor is evenly distributed, and substantially all in air gap side, does not almost distribute in rotor side.Be illustrated in figure 4 motor-field intensity distributions cloud atlas, can find out that from way the magnetic field of motor is maximum at stator teeth.Fig. 5 is the close distribution curve of motor gas-gap magnetic, and in figure, dotted line is the air gap flux density of novel magnetic steel after improving, and solid line is the air gap flux density before improving, and the new structure air gap flux density after as can be seen from the figure improving increases, consistent with expected results.Fig. 6 is the curve of phase current before and after motor improves, and bold portion is the curve after motor improves, and improve after-current as seen from the figure and reduce, power of motor density increases.From simulation result, the performance of motor is consistent with expected results, uses this novel magnetic steel structure that power of motor density can be made to increase, and volume and quality reduce.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment when not departing from principle of the present utility model and aim, revising, replacing and modification in scope of the present utility model.
Claims (1)
1. a magnetic steel structure of motor rotor, is characterized in that: described magnetic steel structure is the cirque structure be made up of n group Triangle ID cross section magnet steel and the outer triangle section magnet steel alternative splicing of n group; Magnet steel summit, described Triangle ID cross section is on cirque structure cylindrical, and between the summit of adjacent two Triangle ID cross section magnet steel, the central angle of circular arc is 360 °/n;
Described outer triangle section magnet steel summit is in cirque structure inner circle, and between adjacent two outer triangle section magnet steel summits, the central angle of circular arc is 360 °/n; Outer triangle section magnet steel is along cirque structure radial magnetizing, and Triangle ID cross section magnet steel magnetizes along cirque structure circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520732757.XU CN205017130U (en) | 2015-09-21 | 2015-09-21 | Magnetic steel structure of motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520732757.XU CN205017130U (en) | 2015-09-21 | 2015-09-21 | Magnetic steel structure of motor rotor |
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| Publication Number | Publication Date |
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| CN205017130U true CN205017130U (en) | 2016-02-03 |
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| CN201520732757.XU Active CN205017130U (en) | 2015-09-21 | 2015-09-21 | Magnetic steel structure of motor rotor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463987A (en) * | 2020-05-11 | 2020-07-28 | 浙江省东阳市东磁诚基电子有限公司 | Novel multidirectional vibration motor and implementation method thereof |
| CN111799054A (en) * | 2020-07-23 | 2020-10-20 | 苏州英磁新能源科技有限公司 | Permanent magnet array |
| CN112039309A (en) * | 2020-10-04 | 2020-12-04 | 西安航天动力测控技术研究所 | Voice coil motor magnetic circuit structure |
| CN112953151A (en) * | 2021-03-04 | 2021-06-11 | 北京航空航天大学 | Outer rotor motor of polygonal dovetail type spliced magnetic steel structure |
-
2015
- 2015-09-21 CN CN201520732757.XU patent/CN205017130U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463987A (en) * | 2020-05-11 | 2020-07-28 | 浙江省东阳市东磁诚基电子有限公司 | Novel multidirectional vibration motor and implementation method thereof |
| CN111799054A (en) * | 2020-07-23 | 2020-10-20 | 苏州英磁新能源科技有限公司 | Permanent magnet array |
| CN111799054B (en) * | 2020-07-23 | 2022-06-24 | 苏州英磁新能源科技有限公司 | Permanent magnet array |
| CN112039309A (en) * | 2020-10-04 | 2020-12-04 | 西安航天动力测控技术研究所 | Voice coil motor magnetic circuit structure |
| CN112953151A (en) * | 2021-03-04 | 2021-06-11 | 北京航空航天大学 | Outer rotor motor of polygonal dovetail type spliced magnetic steel structure |
| CN112953151B (en) * | 2021-03-04 | 2022-05-03 | 北京航空航天大学 | Outer rotor motor of polygonal dovetail type spliced magnetic steel structure |
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